only periods 1 and 2 can use this) ○ Was solution 3 soluble or insoluble in Bacl2 and Agno3? That can help us decide whether its cl2 or so4. bacl was precipitate ■ precipitate in bacl2 and naoh ■ Unknown 4 ● CuSo4 ○ bacl2 precip means so4 ○ blue color means copper ○ also paperclip looked copper colored when left in this solution ● Unknown 5 ● NH4NO3 or NH4Cl ○ nh4cl most likely ○ i agree with nh4cl ○ Reasoning? ○ if it was nh4no3 it would not form precipitate
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1. When glucose‚ C6H12O6‚ is completely oxidized with excess oxygen‚ what are the products? A. H2O2 and CO2 B. H2O and CO2 C. H202 and CO D. H2O and CO 2. Which ion may form a scummy precipitate with ordinary soap? (soap has a negative charge) A. HCO3- B. CO32- C. Na+ D. Ca2+ 3. An element forms a basic oxide with the formula XO and a hydride with the formula XH2. The hydride reacts with water to give hydrogen gas. The element X could be? A. K B. Ca C. N D. O 4. Which metal reacts with concentrated
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Sulphur Sulphur is a non metal element in group 6 of the periodic table. Sulphur has many useful properties which make it widely used in the industry. Sources of Sulphur: Sulphur is found in many places in the world in different forms. It usually exists in volcanic regions in USA‚ Mexico and Sicily. Sulphur could also be obtained from some metal ores like Copper pyrites (CuFeS2) and Blende (ZnS). Properties of Sulphur: In room temperature‚ sulphur is a yellow‚ brittle solid
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carbonyls is possible with aldehydes‚ it is not possible with ketones. Ketones lack the easily removed hydrogen that is adjacent to the carbonyl. The goal of this experiment is to carry an oxidization of diphenylmethanol with a solid oxidant of KMnO4 and CuSO4. Scheme 5.5: KMnO4 is the oxidant in this reaction that oxidizes the alcohol to the ketone. The CuSO 4 is there to support the KMnO4. The oxidant reacts with the secondary alcohol which forms benzophenone and MnO2. Then the melting point of the
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Summative Assessement-1 Examination 2014 Science Class – X Time allowed: 3 hours Maximum Marks: 90 General Instructions: a) b) c) d) e) f) g) h) 1. 2. 3. 4. 5. 6. 7. The question paper comprises of two sections‚ A and B. you are to attempt both the sections. All questions are compulsory. Questions 1 to 3 are one mark question of section A. Questions 4 to 6 carry two marks each of section A. Questions 7 to 18 carry three marks each of section A. Questions 19 to 24 carry five marks each of section
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Erin Bolton Chemistry Lab Report April 29‚ 2015 Lab: Reaction Rates Introduction: In this experiment we studied the reaction of potassium persulfate‚ K2S2O8‚ with potassium iodide‚ KI. All chemical reactions have an energy barrier to overcome before the reaction will proceed. We will record data based on the concentration‚ temperature and catalyst for each experiment. Once this has been completed it will be graphed. Procedure: Due to the chemicals being used having hazard gloves are used
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Emilia Monroe August 27‚ 2014 Experiment #01 The Determination of the Percent of Water in a Compound CHEM 1315-022 For experiment one‚ The Determination of the Percent of Water in a Compound‚ the sole purpose of conducting this experiment was to determine the percent of water found in compounds such as Magnesium Sulfate‚ Copper Sulfate‚ and so on. Along with determining the percentages of the hygroscopic compounds the experiment allowed for the exploration of separation of hydrogen bonds
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b. Solid mercury (II) oxide is heated‚ liquid mercury and oxygen gas is produced. c. Aqueous solution of sulphuric acid and sodium hydroxide react to form aqueous sodium sulphate and water. 2. Balance the following equation. a. Fe(s)+CuSo4 (aq)---(FeSo4(aq)+Cu(s) b.H2So2(aq)+NaOH(aq)-(Na2SO4(aq)+H2O(l) c.Ba(OH)2(aq)+HBr(aq)-(BaBr2(aq)+H 2O(l) 3.What is differences between combination and decomposition reaction? Explain with examples. 4. Can a displacement reaction
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change F NaOCl and KI Turns pale orange/yellow G KI and Pb(NO3)2 Milky yellow solid H NaOH and phenolphthalein Turns bright pink I HCl and phenolphthalein Bubbles- cloudy J NaOH and AgNO3 Solid formed/ turned brown K AgNO3 and NH3 No change L NH3 and CuSO4 Tiny particles/ blue Questions Use what you learned in this lab to answer the following questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence
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CHEMICAL KINETICS: IODINE-CLOCK REACTION DATE SUBMITTED: 14 DECEMBER 2012 DATE PERFORMED: 7 DECEMBER 2012 ABSTRACT Chemical kinetics involving reaction rates and mechanisms is an essential part of our daily life in the modern world. It helps us understand whether particular reactions are favorable and how to save time or prolong time during each reaction. Experiment demonstrated the how concentration‚ temperature and presence of a catalyst can change the rate of a reaction. 5 runs of dilution
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